Boundaries serve a purpose, in sport and in life. Fences keep out trespassers and protect children on playgrounds. Governments impose speed limits. Lines define a football field. The problem faced by moral-political forces -- from Prohibition, to abortion and now same-sex marriage -- is that they are confronted by growing numbers of people who do not believe in, or can be persuaded by, ancient, even biblical, instruction constraining human behavior. Many young people whose parents are divorced, or who are cohabiting without marriage, are not influenced by such commands or "preaching."
While the Supreme Court's 5-4 decision overturning the Defense of Marriage Act does not establish a constitutional right to same-sex marriage, that's where it seems headed. Justice Antonin Scalia predicted it would a decade ago when the Supreme Court invalidated laws prohibiting homosexual conduct in Lawrence v. Texas.
One doesn't have to approve of the Court's "reasoning" in order to hand it to the gay rights campaigners. They have done a magnificent job advancing their objectives, but they couldn't have done it alone. A verse from the Old Testament warns about the detrimental effects such "advances" can have on individuals and nations that abandon moral boundaries: "In those days Israel had no king; everyone did what was right in his own eyes." -- Judges 17:6, NIV